Electrical train-stop.



PATENTBD MAY 7, 1907.

ELEGTRICAL TRAIN STOP.

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w I Kim w I APPLICATION FILED JUNE 14,1906.

WU?" moses HIRAM e. SEDGWICK, or MILL VALLEY, CALIFORNIA.

ELECTRICAL TRAIN-STOP.

Specification of Letters Patent.

Patented May 7,1907- Application filed June 14,1906. Serial No, 321,762.

To call w/wnt it 111/0111 concern:

Be it known'that I, HIRAM G. SEDGwicK, a

' citizen of the United States of America, and

a resident of Mill Valley, county of Marin, State of California, have invented certain new and useful Improvements in Electrical Train Stops, of which the following is a full and clear specification, reference being had to the accompanying drawing, in which Figure 1 is a diagram showing one section' or blockof a single track roadway; and Fig. 2 aside elevation showing the stopping magnet and the electrically-controlled train-stop:

ping circuit on the locomotive or other vehiole of the train.

The object of this invention is to provide.

an extremely simple block system for preventing collisions, means being provided whereby each train as it proceeds pre'e'mpts. a block or section of the. roadway, preventing any train coming from either directionfrom entering the block until itiis free of trains, the means for preventing trains from entering the block while thus preempted being entirely automatic and independent of all signals and the actions of. the train-crews, as more fully hereinafter set forth' Referring to the drawings annexed by reierence-characters, a designates the main orblock sections of the rails of each of which is bonded 1n the usual manner, and b designates f short railsections one of which 18 placed between the adjacent ends of each pair of block I when a train is on one of tlieblocks no other train can enter that block from eithe'r end as sections and is insulated therefrom. Adjacent to each short rail section, at each side of r the track, is a pair of contacts 0 suitably insulated from each other. Each pair of contacts is included in a circuitd, one end of thiscircuit being connected to the block rails and the other to the adjacent short/rails, so that each circuitwill be open at three points, namely .between the contacts, between the short rail sections, and alsobetween-the railsof the block. The contacts'on the left hand side of the roadbed are connected with the adj acent ends of the rails of one of the blocks and the circuit of each right hand pair of c'ontacts'is connected'to the adjacent ends of the other block, so that the latter contacts are adapte'd to co-operate with trains going toward the right whilethe other contacts are adapt-ed to co-'operatte' with trains going toward the left.

' 'Any suitablebrake-applying mechanismmay be used-on the locomotive, showionearrangenient for operating the In Fig. 2 1

- battery It to a contact "5 on the reverse lever.

By this arrangement it willbe observed that when the reverse lever f is thrown forward to drive the locomotiveforwardly, the contact/'1 willcome into contact with theforward' one of the contacts e thereby bringing intothe circuit the brushes g which will be on the right hand side of the locomotive and at the same time cutout the brushes 9 which will be located on the left hand side of the locomotive. WVhe'n the reverse lever is adjusted be incircuit with the magnet and the bat: tery, thereby rendering the brushes g inactive. lt'will be observed, therefore, that by the act of reversing the direction of movement-of the locomotive the proper pair of brushes will l e brought into requisition, the

ingly simple as is obvious. In my former application serially numbered 288,914, filed mechanism for thus automatically cutting out the brushes that are to be inactive.

It will be observed that in this system when it ap roaches the block it ,win be stopped at t e short rail section. The train in the block through its wheels and axles completes part of the circuit while the oncom wing train completes the other two breaksflin the circuit by means'of its wheel and its brushes.

confined to the specific details of construction shown and described. v

What I claim and desire to secure by Letters Patent is 1. In'a system of thecharacter set forth, a series of block railssuitably bonded, a short *rail section between each pair of block rails and insulated from the block rails, a air of contacts at each side of the track aijacent the shortrail sections, and a partial circuit connected to each pair of contacts and to the short rail sect-ions and the main block rails,

backwardly the other pair of brushes 9 will devices for accomplishingthis being exceed- November'24, 1905, I have shown another s and ax lesl "It will/be obvious that this invention is not 'I so that each circuit will be open at three points, the comma its at one side being con- ,nected to onejpaii' of block rails and the con- 5 2-. In a train-stopping apparatus for use on; a locomotive, a brake magnet, a pair of brushes at each sideof the locomotive, twojone of these vcontacts being electrically 0011- artial circuits including the brushes and thenected to the adjacent short rail and the magnet and a battery, a pair of stationary 10 contacts connectedto both circuits, and a movable contact carried by the reverse lever of the locomotive, for the purpose set forth.-

' 3; In asystem of thetype set forth, a. Se-

b'lock'rails suitably bonded, a seseptionsfinterposed between and insulat omsaid main sections, a pair of contacts adjacent'toeach short rail section, and a artial circuit for each pair of contacts, sai circuit including the contacts, the rails of the short section, and the rails of the adiacent block section whereby the ciriadjacent to the right hand s unit will be open at threepoints, substan tially as and for the purpose set forth. I

4. In a system of the character set forth, a

series of block railsand intermediate insulated short rail sections, alpalr of contacts tort rail section.

otheribeing connected to the adjacent end.of

- the right hand rail of the block just ahead, and a conductor electrically connecting the op osite short rail section to the left hand rai of the block just ahead, for the purpose set forth. v

In testimony whereof I hereunto a'fiiX my signature in the presence of two-witnesses this 7th day of April 19()6 HI'RAM G. SEDGWICK. I Witnesses '5. IL RoBERTs,

ERNEsT J. IVIOTT. 

